T01: Frontend Foundation – Nuxt 3 + Tailwind + Design Tokens + Layout + Meta

- Nuxt 3 project with @nuxtjs/tailwindcss module
- Tailwind CSS config with A0 Dark Theme design tokens (CSS custom properties)
- AppHeader: sticky, logo, nav, phone, social icons, mobile burger menu
- AppFooter: 4-column grid (Navigation, Kontakt, Rechtliches, Social)
- HmsLogo: SVG with orange #EC6925 border
- error.vue: 404 page with Seite nicht gefunden
- robots.txt server route: Disallow: /
- Meta: noindex, nofollow, noarchive, nosnippet
- JSON-LD: LocalBusiness schema
- OpenGraph tags
- routeRules: SSR/CSR per route
- Shared components: LoadingSkeleton, EmptyState, ErrorState, LegalContentPage, SpeakerIcon
- 42 vitest tests passing
- Build: 0 errors

frontend/vitest.config.ts

@@ -0,0 +1,16 @@
+import { defineConfig } from "vitest/config";
+import { fileURLToPath } from "node:url";
+
+export default defineConfig({
+  test: {
+    environment: "happy-dom",
+    globals: true,
+    include: ["tests/unit/**/*.test.ts"],
+  },
+  resolve: {
+    alias: {
+      "~": fileURLToPath(new URL("./", import.meta.url)),
+      "#app": fileURLToPath(new URL("./node_modules/nuxt/dist/app", import.meta.url)),
+    },
+  },
+});